Pope Benedict XVI, waves to Lebanese faithful from his popemobile in front of a mosque, seen in the background, as he arrives to hold a mass on the waterfront of downtown Beirut, Lebanon, Sunday Sept. 16, 2012. The Pope celebrated an open-air Mass for tens of thousands of pilgrims from across the Middle East, saying Christians must do their part to end the \"grim trail of death and destruction\" in the region. \"I appeal to you all to be peacemakers,\" Benedict said. (AP Photo)